Leiden
September
Weather in Leiden for September 2025
Your guide to Leiden weather in September - trends and predictions
In general, the average temperature in Leiden at the beginning of September is 23.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.3 °C by the end of September.
Leiden sees moderate rainfall in September, averaging 9 rainy days.
Is September a good time to visit Leiden? check out the best time to travel to Leiden page.
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21
Dry days
9
Rainy days
0
Snow days
21°/16°
Temperatures
21 km/h
Avg max wind
71 %
Avg humidity
Leiden in September average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  23° | 2  22° | 3  21° | 4  21° | 5 27° | 6 26° | 7 26° |
| 8 23° | 9  21° | 10 23° | 11 19° | 12 17° | 13 17° | 14 17° |
| 15 20° | 16  20° | 17 21° | 18 21° | 19 21° | 20 21° | 21 21° |
| 22 19° | 23 17° | 24 18° | 25 17° | 26 19° | 27 18° | 28 16° |
| 29 17° | 30 16° |
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Temperatures trend during September in Leiden
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 23° /14° | 1.2 mm | 5 | |
| 2 Sept. | Mist | 22° /17° | 6.5 mm | 5 | |
| 3 Sept. | Partly cloudy | 21° /16° | 0.3 mm | 6 | |
| 4 Sept. | Sunny | 21° /15° | 0.3 mm | 5 | |
| 5 Sept. | Sunny | 27° /16° | 0.3 mm | 7 | |
| 6 Sept. | Sunny | 26° /18° | 4.4 mm | 6 | |
| 7 Sept. | Sunny | 26° /18° | 0.2 mm | 6 | |
| 8 Sept. | Sunny | 23° /17° | 1.2 mm | 6 | |
| 9 Sept. | Cloudy | 21° /17° | 1.5 mm | 5 | |
| 10 Sept. | Sunny | 23° /16° | 4.8 mm | 6 | |
| 11 Sept. | Patchy rain possible | 19° /15° | 6.1 mm | 4 | |
| 12 Sept. | Partly cloudy | 17° /13° | 8.9 mm | 5 | |
| 13 Sept. | Cloudy | 17° /12° | 3 mm | 4 | |
| 14 Sept. | Sunny | 17° /12° | 0.1 mm | 5 | |
| 15 Sept. | Partly cloudy | 20° /13° | 0 mm | 6 | |
| 16 Sept. | Overcast | 20° /15° | 0.6 mm | 5 | |
| 17 Sept. | Overcast | 21° /15° | 0 mm | 5 | |
| 18 Sept. | Light rain shower | 21° /16° | 5.1 mm | 6 | |
| 19 Sept. | Light rain shower | 21° /15° | 3.9 mm | 5 | |
| 20 Sept. | Patchy rain possible | 21° /15° | 0.6 mm | 6 | |
| 21 Sept. | Light rain shower | 21° /14° | 10.1 mm | 6 | |
| 22 Sept. | Light rain shower | 19° /14° | 3.5 mm | 5 | |
| 23 Sept. | Light rain shower | 17° /14° | 8 mm | 4 | |
| 24 Sept. | Patchy rain possible | 18° /12° | 1.1 mm | 4 | |
| 25 Sept. | Patchy rain possible | 17° /13° | 6 mm | 4 | |
| 26 Sept. | Overcast | 19° /14° | 10.8 mm | 5 | |
| 27 Sept. | Partly cloudy | 18° /14° | 12.6 mm | 5 | |
| 28 Sept. | Patchy rain possible | 16° /13° | 2 mm | 4 | |
| 29 Sept. | Light rain shower | 17° /12° | 0.3 mm | 4 | |
| 30 Sept. | Cloudy | 16° /11° | 7.4 mm | 4 | |
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Important Notice
Our weather forecast for Leiden in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Leiden forecast closer to your planned date for the most up-to-date weather information.
Leiden in September - FAQ
What are the expected maximum and minimum temperatures in Leiden during September?
During September, expect a variety of temperatures with highs around 21° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Leiden during September?
Moderate rainfall is anticipated in Leiden during September, with a total of 77.8 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Leiden during September?
The average wind speed in Leiden during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Leiden in September?
As you prepare for your trip to Leiden in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Leiden, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Layered Clothing: Light sweaters, long-sleeve shirts, light jackets, and comfortable pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
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